Even in the event that an attacker gains more than 50% of the network's
computational power, only transactions sent by the attacker could be
reversed or double-spent. The network would not be destroyed.

Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction. Advertise here.

There's an interesting development: http://ripple.comIt's currently in beta, and I would not trust it with significant amounts of *coins, but I think it's worthwhile to learn about their concepts for easy interconnection of exchanges.